In a medium bowl, whisk together the flour, sugar, and salt. Using your finger tips, rub in the cold cubes of butter until you have mostly pea-sized chunks of butter covered in flour. Stir the apple cider vinegar and the vodka into the ice water. Add the ice water 1 Tablespoon at a time, stirring with the tip of a knife or with your fingertips to bring the dough together. It should take about 2 1/2-3 Tbsp. Form the ball into the dough, pressing it against the bowl to catch any dry bits at the bottom. Shape the dough into a flat disc and wrap in plastic wrap. Chill for 30-60 minutes.